Town of Fromberg

SAGR Polishing Reactor, Aerated Lagoons, Lift Station, UV

The Town of Fromberg entered into an Administrative Order of Consent on January 13, 2012 with the DEQ due to violations of the discharge permit for their wastewater lagoon system. The Town hired Great West to complete a Preliminary Engineering Report (PER) to complete a detailed analysis of the existing wastewater facilities and to identify alternatives to correct any deficiencies. The preferred alternative included the construction of a two-cell aerated lagoon system with Submerged Attached Growth Reactor (SAGR) polishing system and ultraviolet disinfection and rehabilitation of the existing lift station.

After assisting the Town with securing funding for the necessary improvements, Great West completed design of the project, and construction of the project was completed in 2018. The project was the first SAGR system constructed in Montana. Since going on-line, the system has consistently produced treated effluent with BOD5 levels below 10 mg/L, non-detectable TSS levels, and ammonia levels less than 0.10 mg/L.

Project Highlights

  • Lift station rehabilitation including new Vaughan Chopper Pumps and controls
  • 2-cell Aerated Lagoon
  • 2 Submerged Attached Growth Reactor (SAGR) Beds
  • Site piping
  • UV disinfection system
  • UV/Blower Building
  • Grant Funding
  • RD - $1.08M
  • TSEP - $750,000
  • CDBG - $450,000
  • DNRC - $125,000

Project Photos

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Permitting • Treatment • Collection • Inflow & Infiltration (I&I) Studies • Lift Stations • Biosolids/Sludge Management • Preliminary Engineering Reports/Facility Plans